How can I release a click-locked mouse pointer in OS X? [duplicate]

Possible Duplicate:
MacBook Pro Trackpad freeze / holds click on its own

Every now and then, seemingly randomly, the mouse pointer on my OS X 10.6.4-running MBP (summer 2009) will become click-locked. What I mean by this is that it acts as though I have drag-lock on, or that I'm holding down the mouse pointer.

I'm not sure how this is happening, or how the lock is getting activated since I have drag lock disabled in the trackpad system preferences.

I've not been able to reliably reproduce the behavior which turns it on, nor the behavior which turns it off. It seems that if I can get Spotlight to open and launch something like Calculator, then quit the the launched program, the click-lock will release.

Otherwise, the only way out of it is to reboot. This is super frustrating, as it's virtually impossible to save whatever I'm working on when the mouse doesn't work and seems to some impede keyboard shortcuts.

Solution 1:

I've never had this problem on my MacBook Pro, with the same configuration. I have a full load of stuff installed on it.

Since it seems like it could be a software issue, I would check all of the software you have installed - perhaps an app is causing the issue.

You could also look at installing BetterTouch Tool; it messes with the touchpad and I have it installed.